Automatic crack monitoring using photogrammetry and image processing

被引：99

作者：

Valenca, J. ^{[1
,4
]}

Dias-da-Costa, D. ^{[2
,5
]}

Julio, E. ^{[1
,6
]}

Araujo, H. ^{[3
]}

Costa, H. ^{[1
,4
]}

机构：

[1] ICIST, P-1049001 Lisbon, Portugal

[2] INESC, P-3000033 Coimbra, Portugal

[3] Univ Coimbra, Dept Elect & Comp Engn, ISR, P-3030290 Coimbra, Portugal

[4] Inst Polytech Coimbra, Dept Civil Engn, P-3030199 Coimbra, Portugal

[5] Univ Coimbra, Dept Civil Engn, P-3030788 Coimbra, Portugal

[6] Univ Tecn Lisboa, Inst Super Tecn, Dept Civil Engn, P-1049001 Lisbon, Portugal

来源：

MEASUREMENT | 2013年 / 46卷 / 01期

关键词：

Laboratorial tests; Crack monitoring; Crack characterisation; Image processing; Photogrammetry; Monitoring;

D O I：

10.1016/j.measurement.2012.07.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This manuscript presents an integrated approach for automatic crack monitoring combining photogrammetry and image processing. In summary, the strain field obtained from photogrammetric data is used to map the cracked areas where image processing is applied. All processing is completely automatic since only a threshold value, related to the width of the crack, needs to be provided. Direct Shear Tests (DSTs) have been selected for calibration, validation and also as an experimental example. In conclusion, critical areas, the corresponding crack pattern and all related measures (e.g. crack width, length, area or path) could be provided for any stage of loading, until the complete failure of the specimens. Furthermore, all outputs require low computational cost, thus allowing monitoring vast campaigns of laboratorial tests. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：433 / 441

页数：9

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